Allen-Bradley MicroLogix 1200 Reference Manual

Publication 1762-RM001C-EN-P
9-2 Compare Instructions
Using the Compare
Instructions
Most of the compare instructions use two parameters, Source A and
Source B (MEQ and LIM have an additional parameter and are described
later in this chapter). Both sources cannot be immediate values. The valid
data ranges for these instructions are:
-32768 to 32767 (word)
-2,147,483,648 to 2,147,483,647 (long word)
Addressing Modes and File Types can be used as shown in the following
table:
IMPORTANT
Only use the High Speed Counter Accumulator (HSC.ACC)
for Source A in GRT, LES, GEQ and LEQ instructions.
Table 9.1 EQU, NEQ, GRT, LES, GEQ and LEQ Instructions
Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page4-2.
Parameter
Data Files
Function Files
(1)
(1) DAT files are valid for the MicroLogix 1500 only. PTO and PWM files are only recommended for use with MicroLogix
1200 and 1500 BXB units.
CS - Comms IOS - I/O DLS - Data Log
(2)
(2) The Data Log Status file can only be used by the MicroLogix 1500 1764-LRP Processor.
Address
Mode
(3)
(3) See Important note about indirect addressing.
Address
Level
O I S B T, C, R N ST L MG, PD RTC HSC PTO, PWM STI EII BHI MMI DAT TPI Immediate Direct Indirect Bit Word Long Word Element
Source A •••••• •••••••••••••• • •••
Source B •••••• ••• ••••••••••
• • •••
IMPORTANT
You cannot use indirect addressing with: S, ST, MG, PD,
RTC, HSC, PTO, PWM, STI, EII, BHI, MMI, DAT, TPI, CS,
IOS, and DLS files.

Allen-Bradley MicroLogix 1200 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1200
Category	Control Unit
Language	English